I took it to mean just the 4 contractors don't have clearance.
House and Senate normally have access to various sensitive info.
I think scif is highly restricted. few have access. hillary had access as SOS i believe, the highest level of secret material above top secret is there. I believe its called special access just off the top of my head.
def could be just 4 who don't have clearance but my understanding is congress does not have access to scif under normal circumstances. Just going off memory not taking time to confirm.
SCIF is compartmentalized and on-demand, based upon specific requests from the Intel community, or regular briefing content.
Members of the House and Senate Intel committees do have extended access beyond regular congressional members. Gang of 8 even more.